UPDATED PRACTICE QUESTIONS AND
SOLUTIONS
◉ Characteristics of hormones. Answer: Circulated through blood in
response to a stimulus (PSNS, SNS, reflexive mechanism)
Secreted in minutes at predictable rates
Bind w/ receptors to change intracellular metabolism
Varying effects on physiological response of target tissues
---> Reproduction
---> Stress/injury response
---> Electrolyte imbalance
---> Energy/metabolism
---> Growth/maturation/aging
◉ Simple feedback system (negative). Answer: High levels of a
hormone inhibit that hormone's synthesis/secretion
,Low levels of a hormone stimulate the synthesis/secretion of that
hormone
ex: Pituitary hormones may be altered by stress/illness
◉ Simple feedback system (positive). Answer: High levels of a
hormone stimulate the synthesis/secretion of that same hormone
Low levels of a hormone inhibit the synthesis/secretion of that same
hormone
Ex: LH on ovarian estradiol secretion during menstrual cycle
◉ Nervous system effects on hormones. Answer: Things like pain,
sex, and stress and can stimulate the NS to secrete hormones
◉ rhythm of hormones secretion. Answer: Circadian rhythm
Hormones fluctuate release during 24 hrs
Ex: Inc cortisol in the AM & dec cortisol in the PM
---> *This is why it's important to know if someone works day shift
or night shift when doing a test*
,◉ Anterior pituitary gland hormones. Answer: GH
TSH
ACTH (releases glucocorticoids)
Prolactin
Gonadotropins: FSH & LH(HS?)
◉ Posterior pituitary hormones. Answer: ADH
---> Maintains osmolality of blood by regulating H2O excretion &
reabsorption by kidney
---> Vasoconstrictor
Oxytocin
---> Stimulates milk let down & UCs in women
---> Stimulates penis & sperm production in men
◉ What things stimulate ADH?. Answer: Dec blood volume
Pain
N/V
Hypoglycemia
◉ Thyroid hormones. Answer: T3 & T4
, ---> These hormones are stimulated by TSH
---> T3/T4 & TSH are inversely related so high T3/T4 = low TSH &
low T3/T4 = high TSH
Calcitonin
◉ #1 most important gland is..... Answer: Pituitary gland because it
controls everything else
◉ T3 & T4 affect what?. Answer: Caloric requirement
---> Maintaining body weight
O2 need & consumption
---> Inc RR & depth of respirations
CO by controlling force of contraction
Growth & dev
Brain function